I had:
$4500 home equity loan at 6%
$6600 on a Mastercard from a balance transfer at 3.99%
I got an offer from my At&T mastercard for 1.99% balance transfer for the life of the balance, and no fee. So I took the whole load and threw it on that. It's sweet. The only rule is, NO CHARGING ON THAT CARD EVER since they put that money at the very end and you always pay the higher rate on that until the balance transer debt is all gone.
I know the home equity was tax deductible, but 1.99 is still better than 6% with a tax deduction.
I used that money to finish building my house and finish the basement so it's good debt, if there is such a thing. I'm paying $500 / month towards it so it won't be around for too long!